#include<bits/stdc++.h>
#define qc ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
#define rt return
#define fi first
#define se second
#define all(x) x.begin(),x.end()
#define rall(x) x.rbegin(),x.rend()
#define vecin(a) for(auto &d:a)cin>>d;
typedef long long int ll;
const long long mod=1e9+7;
const int int_inf=2147483647;
const long long int ll_inf=9223372036854775807;
const int alp_up=64;
const int alp_lw=96;
int dx[]={-1,-1,0,1,1,1,0,-1};
int dy[]={0,1,1,1,0,-1,-1,-1};
using namespace std;
ll gcd(ll a,ll b){if(b==0)rt a;rt gcd(b,a%b);}
ll lcm(ll a,ll b){rt a/gcd(a,b)*b;}
void setIO(string name)
{
ios_base::sync_with_stdio(0);
cin.tie(0);
freopen((name+".in").c_str(),"r",stdin);
freopen((name+".out").c_str(),"w",stdout);
}
/*
int n;
vector<int>h;
vector<vector<int>>l,r,low,hgh;
void init(int N,vector<int>H)
{
n=N;h=H;
l.resize(20,vector<int>(n,-1));
r.resize(20,vector<int>(n,-1));
low.resize(20,vector<int>(n,-1));
hgh.resize(20,vector<int>(n,-1));
// monotonic stack for l and r
// -1 means no target
stack<int>s;
for(int i=0;i<n;i++)
{
while(!s.empty()&&h[s.top()]<h[i])s.pop();
if(!s.empty())l[0][i]=s.top();
s.push(i);
}
while(!s.empty())s.pop();
for(int i=n-1;i>=0;i--)
{
while(!s.empty()&&h[s.top()]<h[i])s.pop();
if(!s.empty())r[0][i]=s.top();
s.push(i);
}
// sparse table for l and r
for(int i=1;i<20;i++){
for(int j=0;j<n;j++){
if(l[i-1][j]!=-1)l[i][j]=l[i-1][l[i-1][j]];
if(r[i-1][j]!=-1)r[i][j]=r[i-1][r[i-1][j]];
}
}
// sparse table for low and hgh
// using dynamic programming
for(int i=0;i<n;i++){
if(l[0][i]==-1)hgh[0][i]=r[0][i];
else if(r[0][i]==-1)hgh[0][i]=l[0][i];
else if(h[l[0][i]]>h[r[0][i]]){
hgh[0][i]=l[0][i];
low[0][i]=r[0][i];
}
else{
hgh[0][i]=r[0][i];
low[0][i]=l[0][i];
}
}
for(int i=1;i<20;i++){
for(int j=0;j<n;j++){
if(low[i-1][j]!=-1)low[i][j]=low[i-1][low[i-1][j]];
if(hgh[i-1][j]!=-1)hgh[i][j]=hgh[i-1][hgh[i-1][j]];
}
}
//for(auto c:l)cout<<c<<" ";cout<<"\n";
//for(auto c:r)cout<<c<<" ";cout<<"\n";
//for(auto c:tall){for(auto d:c)cout<<d<<" ";cout<<"\n";}
}
int tallest(int cur,int tar) // tallest tree in [cur,tar]
{
for(int i=19;i>=0;i--){
if(r[i][cur]==-1)continue;
if(r[i][cur]>tar)continue;
cur=r[i][cur];
}
rt cur;
}
int minimum_jumps(int a,int b,int c,int d)
{
if(b+1==c)rt (r[0][b]<=d&&r[0][b]!=-1)? 1:-1; // no tree in [b+1,c-1]
int t_cd=tallest(c,d); //tallest tree in [c,d]
int t_bc=tallest(b+1,c-1); // tallest tree in [b+1,c-1]
int cur=b,ans=0;
// tallest tree from b to left, not higher than t_cd
for(int i=19;i>=0;i--){
if(l[i][cur]==-1)continue;
if(l[i][cur]<a)continue;
if(h[l[i][cur]]>h[t_cd])continue;
cur=l[i][cur];
}
if(h[cur]>h[t_bc]){ // straight away jump to [c,d]
rt (r[0][cur]<=d&&r[0][cur]!=-1)? 1:-1;
}
// choose higher edge to jump, not higher than h[t_bc]
for(int i=19;i>=0;i--){
if(hgh[i][cur]==-1)continue;
if(h[hgh[i][cur]]>h[t_bc])continue;
cur=hgh[i][cur];
ans+=(1<<i);
}
if(cur==t_bc)rt (r[0][cur]<=d&&r[0][cur]!=-1)? ans+1:-1;
// any jump will cause h[cur] > h[t_bc]
if(l[0][cur]!=-1&&c<=r[0][l[0][cur]]&&r[0][l[0][cur]]<=d)rt ans+2; // consider left
for(int i=19;i>=0;i--){ // consider right
if(r[i][cur]==-1)continue;
if(c<=r[i][cur])continue;
cur=r[i][cur];
ans+=(1<<i);
}
// jump to right suppose in [c,d]
cur=r[0][cur];ans++;
rt (c<=cur&&cur<=d)? ans:-1;
}
int xmain()
{
init(7, {3, 2, 1, 6, 4, 5, 7});cout<<minimum_jumps(4, 4, 6, 6)<<" "<<minimum_jumps(1, 3, 5, 6)<<" "<<minimum_jumps(0, 1, 2, 2);
//init(5,{5,1,2,3,4});cout<<minimum_jumps(1,1,4,4);
//init(9,{9,6,4,2,1,3,5,7,8});cout<<minimum_jumps(0,0,1,1);
//init(8,{1,2,3,4,5,6,7,8}); cout<<minimum_jumps(0,2,4,7);
cout<<"\n";
for(int i=0;i<9;i++){for(int j=i+1;j<9;j++)cout<<minimum_jumps(i,i,j,j)<<" ";cout<<"\n";}
rt 0;
}
/*/
int n,k;
vector<vector<int>>edge;
vector<int>a;
void init(int N,int K)
{
n=N,k=K;
edge.resize(n);
a.resize(n,-1);
for(int i=0;i<k-1;i++){
edge[i].push_back(i+1);
}
//for(int i=1;i<k;i++)a[i]=0;
}
int add_teleporter(int u,int v)
{
edge[u].push_back(v);
vector<bool>vis(n,0);
queue<int>q;
q.push(v);vis[v]=1;
while(!q.empty()){
int f=q.front();
q.pop();
if(a[u]==-1){
if(u<k)a[f]=u;
}
else{
a[f]=max(a[f],a[u]);
}
for(auto c:edge[f]){
if(vis[c])continue;
q.push(c);vis[c]=1;
}
}
//for(auto c:a)cout<<" "<<c;cout<<"\n";
for(int i=0;i<k;i++){
if(a[i]==i)rt 1;
}
rt 0;
}
int zmain()
{
//init(6,3);cout<<add_teleporter(3,4)<<add_teleporter(5,0)<<add_teleporter(4,5)<<add_teleporter(5,3)<<add_teleporter(1,4);
//init(6,3);cout<<add_teleporter(5,0)<<add_teleporter(1,4)<<add_teleporter(2,4)<<add_teleporter(4,5);
init(6,6);for(int i=2;i<6;i++)for(int j=i+1;j<6;j++)cout<<add_teleporter(j,i);
rt 0;
}
//*/
Compilation message
game.cpp: In function 'void setIO(std::string)':
game.cpp:24:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
24 | freopen((name+".in").c_str(),"r",stdin);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
game.cpp:25:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
25 | freopen((name+".out").c_str(),"w",stdout);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
0 ms |
208 KB |
Output is correct |
| 2 |
Correct |
0 ms |
208 KB |
Output is correct |
| 3 |
Incorrect |
1 ms |
208 KB |
Wrong Answer[1] |
| 4 |
Halted |
0 ms |
0 KB |
- |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
0 ms |
208 KB |
Output is correct |
| 2 |
Correct |
0 ms |
208 KB |
Output is correct |
| 3 |
Incorrect |
1 ms |
208 KB |
Wrong Answer[1] |
| 4 |
Halted |
0 ms |
0 KB |
- |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
0 ms |
208 KB |
Output is correct |
| 2 |
Correct |
0 ms |
208 KB |
Output is correct |
| 3 |
Incorrect |
1 ms |
208 KB |
Wrong Answer[1] |
| 4 |
Halted |
0 ms |
0 KB |
- |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
0 ms |
208 KB |
Output is correct |
| 2 |
Correct |
0 ms |
208 KB |
Output is correct |
| 3 |
Incorrect |
1 ms |
208 KB |
Wrong Answer[1] |
| 4 |
Halted |
0 ms |
0 KB |
- |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
0 ms |
208 KB |
Output is correct |
| 2 |
Correct |
0 ms |
208 KB |
Output is correct |
| 3 |
Incorrect |
1 ms |
208 KB |
Wrong Answer[1] |
| 4 |
Halted |
0 ms |
0 KB |
- |
